#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{
	int a, b;
	scanf("%d%d", &a, &b);
	int count = 0;
	for (int i = 0; i <= 32; i++)
	{
		if (a % 2 != b % 2)
			count++;
		a /= 2;
		b /= 2;
	}
	printf("%d",count);
	return 0;
}